Thousand Sunny Cosplay Build
IN-PROGRESS: Original Armor Design Inspired by the Thousand Sunny from One Piece
My Thousand Sunny Armor Cosplay is an in-progress original warrior armor design inspired by the Thousand Sunny ship from One Piece. Instead of recreating the ship as a prop or model, I am translating its most recognizable features into a wearable fantasy armor build.
This build is still very early, but I wanted to start documenting the process while it is actually happening. There is a lot of work left to do, a lot of details still being figured out, and probably several future problems I have not emotionally prepared for yet.
Why I Chose To Cosplay The Thousand Sunny Ship
I know this sounds ridiculous, but the idea basically started with: what if I became the Thousand Sunny ship from One Piece?
The Thousand Sunny is one of the most recognizable ships in anime. The lion figurehead, red and white side panels, numbered Soldier Dock System, striped sails, circular porthole details, and giant personality of the ship all make it visually memorable. I did not want to make a literal boat costume, though. I wanted to design something that felt like the Sunny had been transformed into a warrior.
I have been thinking about this idea for months, but I did not want to announce it until I had something real to show. Once I started sketching the concept and building the first foam pieces, it finally felt like the idea was becoming real.
The drawing is absolutely not professional concept art. It is a chaos sketch that helped me get the idea out of my head and onto paper. But that sketch became the blueprint for the build, and honestly, that feels very on brand for this project.
The Thousand Sunny Armor Concept
This cosplay is not meant to be a direct replica of the Thousand Sunny. It is an original armor interpretation inspired by the ship’s design language.
The main concept is to take the most recognizable parts of the Sunny and assign them to different areas of the costume:
The helmet is inspired by the Sunny’s lion figurehead. I want the front of the headpiece to immediately read as the Sunny, with the lion face, sun mane, bones, and paw details worked into the design.
The back of the helmet is planned to reference the back and top deck of the ship. Since the lion figurehead is the front of the ship, I thought it would be funny and visually interesting to balance it with ship/stern details on the back of the headpiece.
The hip armor is based on the Thousand Sunny’s numbered Soldier Dock System panels. I am currently working on the Channel 3 side, using the circular numbered door, red and white panel shapes, black trim, and wood plank details from the ship.
The knee armor will also connect to the Soldier Dock System. One knee is planned to represent Channel 2, Mini Merry II, and the other will represent Channel 3, Shark Submerge III. I want these details to look like the vehicles are emerging from the armor without making the knees too bulky or impossible to walk in.
The cannon is being designed as a functional cannon bag. It will look like a ship cannon, but it will also work as a small purse for convention essentials like my phone, cards, keys, and other small items.
The cape is still undecided. I am considering either a Straw Hat Jolly Roger flag-inspired cape or a cape inspired by the Sunny’s main sail.
This is the kind of build where every detail creates five more decisions, but that is also what makes it exciting.
Current Thousand Sunny Cosplay Build Progress
Soldier Dock System Armor Hip Panels
This cosplay is currently in progress, and the first major pieces I started working on are the hip armor panels.
The hip armor is inspired by the Thousand Sunny’s Soldier Dock System, specifically the large circular numbered doors on the side of the ship. It has such a strong visual identity: the large red number, warm wood center, thick black outer ring, red side panels, white trim, and small circular porthole details.
The base shape was built from 5mm EVA foam and painted by hand. I have been debating on making the wood section look more dimensional while still keeping it true to the anime style. I do not want it to look hyper-realistic or muddy. The goal is more like animated wood: clean plank lines, warm brown shading, subtle wood grain, and bold contrast.
But for now, both Channel 2 and Channel 3 are "finished" with a top coat of satin spray paint. If I decide to make a subtle wood grain, I will add that later.
Thousand Sunny Helm Medallion
The Thousand Sunny helm is a fun detail from the ship that I knew I wanted to incorporate. Instead of simply attaching it as decoration, I designed it to become the centerpiece of the belt, giving the front of the costume a recognizable Sunny detail without competing with the lion figurehead helmet.
The medallion itself was 3D printed, sanded, and hand painted. Since the rest of the costume relies heavily on hand painted details, I wanted the helm to feel like it belonged with the armor rather than looking like a separate printed prop.
The medallion is technically finished, because it is not permanently attached yet. I am still experimenting with the circular backing piece that will mount it to the belt. Right now I am balancing two goals: making the helm stand out enough to immediately catch the eye while still keeping it cohesive with the red, white, wood, gold color palette used throughout the rest of the Thousand Sunny armor. I plan to finish painting the full belt and attach the hip armor before making that final design decision.
Mini Merry II Knee Armor Piece
The next major piece I finished for my Thousand Sunny cosplay armor is the Mini Merry II knee armor. This was one of the tougher pieces so far, but also one of the most fun because I wanted it to feel dimensional instead of just painting the design flat onto foam.
Mini Merry II is part of the Thousand Sunny’s Soldier Dock System, so I wanted this knee piece to look like the little ship was emerging from the armor without making it so bulky that I would not be able to walk comfortably. Getting that balance right took a lot of precision, layering, shaping, and staring at reference photos.
The base was made from EVA foam using a mix of 2mm, 3mm, 5mm, and 8mm foam. I was able to use mostly scrap EVA foam for the smaller layered details.
For the ram head, I built the rounded base out of foil, covered it with foam clay, and then sanded it down to create a smoother shape.
To create the wood plank effect, I used heat-scored lines in the EVA foam so the grooves would open slightly and read as actual panel separations instead of just painted lines. After that, the whole piece was hand-painted with acrylic paint.
This piece was definitely meticulous, but I love how much personality it adds to the costume. Since this armor design is all about translating the Thousand Sunny into a wearable warrior look, the Mini Merry II knee armor helps bring in one of the ship’s smaller but instantly recognizable details.